Evaluation of Corrosion Resistance of Titanium Alloys Used for Medical Implants

Archives of Metallurgy and Materials

A. Kajzer¹  J. Marciniak¹  J. Szewczenko¹  W. Kajzer¹ 

[1] Silesian University of Technology, Department of Engineering Materia ls and Biomateria ls, 40 Roosevelta Str., 41-800 Zabrze, Poland

关键词: Keywords: metallic biomaterials;    titanium alloys;    corrosion resistance;    mechanical processing;    anodic oxidation;   

DOI  :  10.1515/amm-2016-0118

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The study presents the results of investigations of modeling the usable properties of implant surfaces made of Ti6Al7Nb alloy, using the example of a dynamic hip screw (DHS) applied in surgical treatment of intertrochanteric femoral neck fractures. Numerical simulation has been performed for the model load of femoral fixation with DHS screw. The load simulation results provided the basis to select mechanical properties of the fixator elements and to define those fixation areas which are mostly susceptible to development of corrosion. The surfaces of Ti6Al7Nb alloy were ground, vibro-abrasive machined, mechanically polished, sandblasted, anode oxidized at different voltage values and steam sterilized. Results of surface topography evaluation, resistance to pitting and crevice corrosion as well as degradation kinetics of the outer layer were presented. Usability of the formed passive layer in clinical applications was evaluated through wear and corrosion tests of the femoral fixation model. The test results proved usefulness of the proposed surface modification methods for clinical application of different size and shape implants

【 授权许可】

Unknown